HK1017476A1 - High areal density magnetic recording medium with dual magnetic layers - Google Patents
High areal density magnetic recording medium with dual magnetic layersInfo
- Publication number
- HK1017476A1 HK1017476A1 HK99102418A HK99102418A HK1017476A1 HK 1017476 A1 HK1017476 A1 HK 1017476A1 HK 99102418 A HK99102418 A HK 99102418A HK 99102418 A HK99102418 A HK 99102418A HK 1017476 A1 HK1017476 A1 HK 1017476A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- recording medium
- layers
- magnetically
- high areal
- areal density
- Prior art date
Links
- 230000009977 dual effect Effects 0.000 title 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 3
- 229910052804 chromium Inorganic materials 0.000 abstract 3
- 239000011651 chromium Substances 0.000 abstract 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- 229910052715 tantalum Inorganic materials 0.000 abstract 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
- G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
- G11B5/672—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
Landscapes
- Magnetic Record Carriers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/614,848 US5763071A (en) | 1996-03-11 | 1996-03-11 | High areal density magnetic recording medium with dual magnetic layers |
PCT/US1996/020157 WO1997034295A1 (en) | 1996-03-11 | 1996-12-23 | High areal density magnetic recording medium with dual magnetic layers |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1017476A1 true HK1017476A1 (en) | 1999-11-19 |
Family
ID=24462961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK99102418A HK1017476A1 (en) | 1996-03-11 | 1999-05-31 | High areal density magnetic recording medium with dual magnetic layers |
Country Status (8)
Country | Link |
---|---|
US (1) | US5763071A (ko) |
JP (1) | JP2000507023A (ko) |
KR (1) | KR100378495B1 (ko) |
CN (1) | CN1154977C (ko) |
DE (1) | DE19681747T1 (ko) |
GB (1) | GB2325777B (ko) |
HK (1) | HK1017476A1 (ko) |
WO (1) | WO1997034295A1 (ko) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5772857A (en) * | 1995-11-21 | 1998-06-30 | Seagate Technology, Inc. | Method of manufacturing CoCrTa/CoCrTaPt bi-layer magnetic thin films |
TW390998B (en) | 1996-05-20 | 2000-05-21 | Hitachi Ltd | Magnetic recording media and magnetic recording system using the same |
US6403203B2 (en) | 1997-05-29 | 2002-06-11 | Hitachi, Ltd. | Magnetic recording medium and magnetic recording apparatus using the same |
US6150015A (en) | 1997-12-04 | 2000-11-21 | Komag, Incorporated | Ultra-thin nucleation layer for magnetic thin film media and the method for manufacturing the same |
US6168861B1 (en) | 1997-12-12 | 2001-01-02 | Seagate Technology Llc | High coercivity, high signal-to-noise ratio dual magnetic layer media |
JPH11238221A (ja) * | 1998-02-20 | 1999-08-31 | Fujitsu Ltd | 磁気記録媒体及び磁気ディスク装置 |
US6261681B1 (en) | 1998-03-20 | 2001-07-17 | Asahi Komag Co., Ltd. | Magnetic recording medium |
US6150001A (en) * | 1998-03-30 | 2000-11-21 | International Business Machines Corporation | Magnetic recording disk with polycyanate ester overlayer |
US6461750B1 (en) | 1998-09-30 | 2002-10-08 | Seagate Technology, Inc. | Magnetic recording medium with dual magnetic layers and high in-plane coercivity |
US6268073B1 (en) | 1998-11-09 | 2001-07-31 | Seagate Technology Llc | Flash layer overcoat for magnetically-induced super resolution magneto-optical media |
US6355342B1 (en) | 1998-11-18 | 2002-03-12 | Seagate Technology Llc | Flash layer overcoat for high density multilayer magneto-optical media |
US6381200B1 (en) | 1998-11-18 | 2002-04-30 | Seagate Technology Llc | Flash layer overcoat for first surface magneto-optical media |
US6623873B1 (en) | 1998-11-20 | 2003-09-23 | Hitachi, Ltd. | Magnetic recording medium and magnetic disk apparatus using the same |
US6324131B1 (en) | 1999-01-04 | 2001-11-27 | Seagate Technology Llc | Low glide magneto-optical recording medium |
US6517956B1 (en) * | 1999-05-03 | 2003-02-11 | Seagate Technology Llc | Magneto-resistance recording media comprising aluminum nitride corrosion barrier layer and a c-overcoat |
US6537686B1 (en) * | 1999-05-19 | 2003-03-25 | Seagate Technology Llc | Magneto-resistance recording media comprising a silicon nitride corrosion barrier layer and a C-overcoat |
US6440589B1 (en) * | 1999-06-02 | 2002-08-27 | International Business Machines Corporation | Magnetic media with ferromagnetic overlay materials for improved thermal stability |
US6689495B1 (en) | 1999-06-08 | 2004-02-10 | Fujitsu Limited | Magnetic recording medium and magnetic storage apparatus |
US6821652B1 (en) | 1999-06-08 | 2004-11-23 | Fujitsu Limited | Magnetic recording medium and magnetic storage apparatus |
US6602612B2 (en) | 1999-06-08 | 2003-08-05 | Fujitsu Limited | Magnetic recording medium and magnetic storage apparatus |
US6645646B1 (en) | 1999-06-08 | 2003-11-11 | Fujitsu Limited | Magnetic recording medium and magnetic storage apparatus |
US6753101B1 (en) | 1999-06-08 | 2004-06-22 | Fujitsu Limited | Magnetic recording medium, magnetic storage apparatus, recording method and method of producing magnetic recording medium |
US6280813B1 (en) | 1999-10-08 | 2001-08-28 | International Business Machines Corporation | Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer |
US6967061B1 (en) | 1999-11-03 | 2005-11-22 | Seagate Technology Llc | Bilayer magnetic structure for high density recording media |
JP2001189005A (ja) * | 1999-12-28 | 2001-07-10 | Fujitsu Ltd | 磁気記録媒体及びその製造方法ならびに磁気記憶装置 |
US6753100B1 (en) * | 2000-05-30 | 2004-06-22 | Maxtor Corporation | Magnetic recording media having adjustable coercivity using multiple magnetic layers and method of making same |
JP3701593B2 (ja) * | 2001-09-19 | 2005-09-28 | 株式会社日立グローバルストレージテクノロジーズ | 垂直磁気記録媒体及び磁気記憶装置 |
US7842409B2 (en) | 2001-11-30 | 2010-11-30 | Seagate Technology Llc | Anti-ferromagnetically coupled perpendicular magnetic recording media with oxide |
CN100505046C (zh) | 2001-11-30 | 2009-06-24 | 希捷科技有限公司 | 反铁磁性耦合的垂直磁记录介质 |
US6808783B1 (en) | 2002-01-17 | 2004-10-26 | Maxtor Corporation | Storage media with non-uniform properties |
US6899959B2 (en) | 2002-02-12 | 2005-05-31 | Komag, Inc. | Magnetic media with improved exchange coupling |
US7592079B1 (en) | 2003-07-03 | 2009-09-22 | Seagate Technology Llc | Method to improve remanence-squareness-thickness-product and coercivity profiles in magnetic media |
JP4309772B2 (ja) * | 2004-01-15 | 2009-08-05 | アルプス電気株式会社 | 磁気検出素子 |
JP2007004907A (ja) * | 2005-06-24 | 2007-01-11 | Hitachi Global Storage Technologies Netherlands Bv | 磁気記録媒体 |
JP4818852B2 (ja) * | 2006-08-31 | 2011-11-16 | ソニーケミカル&インフォメーションデバイス株式会社 | 磁性シートの製造方法及び磁性シート |
JP2008065916A (ja) * | 2006-09-08 | 2008-03-21 | Tdk Corp | 磁気記録媒体 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3047423A (en) * | 1958-12-17 | 1962-07-31 | Ibm | Isotropic thin magnetic film |
FR1438563A (fr) * | 1965-04-02 | 1966-05-13 | Bull General Electric | Perfectionnements aux lames ou couches ferromagnétiques couplées |
JPS6084159A (ja) * | 1983-05-31 | 1985-05-13 | 三興商事株式会社 | 圧縮原料の解砕装置 |
JPS60101709A (ja) * | 1983-11-05 | 1985-06-05 | Alps Electric Co Ltd | 垂直磁気記録媒体 |
JPS60117413A (ja) * | 1983-11-29 | 1985-06-24 | Tdk Corp | 磁気記録媒体の製造方法 |
US4798765A (en) * | 1985-03-28 | 1989-01-17 | Victor Company Of Japan Ltd. | Perpendicular magnetic recording medium |
JP2555683B2 (ja) * | 1988-04-04 | 1996-11-20 | 日本ビクター株式会社 | 磁気記録媒体 |
US5344706A (en) * | 1991-10-01 | 1994-09-06 | Carnegie Mellon University | Magnetic recording medium comprising an underlayer and a cobalt samarium amorphous magnetic layer having a SmCo5 crystalline interface with the underlayer |
JP2725502B2 (ja) * | 1991-10-14 | 1998-03-11 | 日本電気株式会社 | 磁気記録媒体 |
JPH05114128A (ja) * | 1991-10-23 | 1993-05-07 | Fujitsu Ltd | メタル薄膜型磁気デイスク媒体およびその製造方法 |
US5462796A (en) * | 1992-05-21 | 1995-10-31 | Stormedia, Inc. | Flash chromium interlayer for improved hard disk magnetic recording performance |
US5432012A (en) * | 1992-06-30 | 1995-07-11 | Hmt Technology Corporation | Thin-film medium with compositional gradient |
JPH0684159A (ja) * | 1992-09-07 | 1994-03-25 | Nec Corp | 磁気記録媒体 |
US5536585A (en) * | 1993-03-10 | 1996-07-16 | Hitachi, Ltd. | Magnetic recording medium and fabrication method therefor |
-
1996
- 1996-03-11 US US08/614,848 patent/US5763071A/en not_active Expired - Lifetime
- 1996-12-23 DE DE19681747T patent/DE19681747T1/de not_active Withdrawn
- 1996-12-23 CN CNB961802057A patent/CN1154977C/zh not_active Expired - Fee Related
- 1996-12-23 WO PCT/US1996/020157 patent/WO1997034295A1/en active IP Right Grant
- 1996-12-23 KR KR10-1998-0706944A patent/KR100378495B1/ko not_active IP Right Cessation
- 1996-12-23 JP JP09532573A patent/JP2000507023A/ja active Pending
- 1996-12-23 GB GB9819579A patent/GB2325777B/en not_active Expired - Lifetime
-
1999
- 1999-05-31 HK HK99102418A patent/HK1017476A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR19990087512A (ko) | 1999-12-27 |
CN1154977C (zh) | 2004-06-23 |
CN1215492A (zh) | 1999-04-28 |
WO1997034295A1 (en) | 1997-09-18 |
US5763071A (en) | 1998-06-09 |
GB2325777A (en) | 1998-12-02 |
JP2000507023A (ja) | 2000-06-06 |
GB2325777B (en) | 1999-12-15 |
KR100378495B1 (ko) | 2003-10-10 |
GB9819579D0 (en) | 1998-11-04 |
DE19681747T1 (de) | 1999-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20041223 |